./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg60-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg60-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 536af0e32effc3a2288f843fefca54fb0104ab1d17ed14d79ddc92c629dbee95 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:39:57,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:39:57,625 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 15:39:57,629 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:39:57,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:39:57,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:39:57,655 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:39:57,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:39:57,656 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:39:57,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:39:57,657 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:39:57,658 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:39:57,658 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:39:57,659 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:39:57,659 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:39:57,660 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:39:57,660 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:39:57,661 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:39:57,661 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:39:57,662 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:39:57,662 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:39:57,663 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:39:57,664 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:39:57,665 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:39:57,665 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:39:57,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:39:57,666 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:39:57,666 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:39:57,667 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:39:57,667 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:39:57,668 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:39:57,668 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:39:57,668 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:39:57,668 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:39:57,669 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:39:57,669 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:39:57,669 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:39:57,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:39:57,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:39:57,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:39:57,670 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:39:57,671 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:39:57,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:39:57,671 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:39:57,671 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:39:57,671 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:39:57,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:39:57,672 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 536af0e32effc3a2288f843fefca54fb0104ab1d17ed14d79ddc92c629dbee95 [2023-12-02 15:39:57,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:39:57,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:39:57,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:39:57,919 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:39:57,920 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:39:57,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/reducercommutativity/avg60-1.i [2023-12-02 15:40:00,619 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:40:00,776 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:40:00,776 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/sv-benchmarks/c/reducercommutativity/avg60-1.i [2023-12-02 15:40:00,784 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/data/adf272fe7/f19c2780bec545ffa13e65a7895793c7/FLAGa8d60dc08 [2023-12-02 15:40:00,796 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/data/adf272fe7/f19c2780bec545ffa13e65a7895793c7 [2023-12-02 15:40:00,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:40:00,800 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:40:00,801 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:40:00,801 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:40:00,806 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:40:00,807 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:40:00" (1/1) ... [2023-12-02 15:40:00,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3373d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:00, skipping insertion in model container [2023-12-02 15:40:00,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:40:00" (1/1) ... [2023-12-02 15:40:00,828 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:40:00,963 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/sv-benchmarks/c/reducercommutativity/avg60-1.i[1282,1295] [2023-12-02 15:40:00,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:40:00,975 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:40:00,993 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/sv-benchmarks/c/reducercommutativity/avg60-1.i[1282,1295] [2023-12-02 15:40:00,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:40:01,006 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:40:01,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01 WrapperNode [2023-12-02 15:40:01,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:40:01,008 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:40:01,008 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:40:01,008 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:40:01,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,041 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-02 15:40:01,041 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:40:01,042 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:40:01,042 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:40:01,042 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:40:01,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,052 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,052 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,058 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,061 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,063 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,064 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,067 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:40:01,068 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:40:01,068 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:40:01,068 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:40:01,069 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (1/1) ... [2023-12-02 15:40:01,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:40:01,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:01,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:40:01,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:40:01,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:40:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:40:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:40:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:40:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2023-12-02 15:40:01,136 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2023-12-02 15:40:01,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:40:01,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:40:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 15:40:01,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:40:01,215 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:40:01,218 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:40:01,377 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:40:01,425 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:40:01,426 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 15:40:01,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:40:01 BoogieIcfgContainer [2023-12-02 15:40:01,427 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:40:01,429 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:40:01,430 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:40:01,432 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:40:01,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:40:00" (1/3) ... [2023-12-02 15:40:01,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662e0ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:40:01, skipping insertion in model container [2023-12-02 15:40:01,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:40:01" (2/3) ... [2023-12-02 15:40:01,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662e0ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:40:01, skipping insertion in model container [2023-12-02 15:40:01,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:40:01" (3/3) ... [2023-12-02 15:40:01,435 INFO L112 eAbstractionObserver]: Analyzing ICFG avg60-1.i [2023-12-02 15:40:01,450 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:40:01,450 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 15:40:01,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:40:01,496 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6a80eb84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:40:01,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 15:40:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 15:40:01,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:01,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:01,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:01,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2028269539, now seen corresponding path program 1 times [2023-12-02 15:40:01,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:01,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93016513] [2023-12-02 15:40:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:01,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 15:40:01,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:01,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93016513] [2023-12-02 15:40:01,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93016513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:40:01,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:40:01,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:40:01,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737750337] [2023-12-02 15:40:01,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:40:01,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:40:01,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:40:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:40:01,821 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 15:40:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:01,865 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-12-02 15:40:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:40:01,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-12-02 15:40:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:01,875 INFO L225 Difference]: With dead ends: 33 [2023-12-02 15:40:01,875 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 15:40:01,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:40:01,882 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:01,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 15:40:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-02 15:40:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-12-02 15:40:01,918 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2023-12-02 15:40:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:01,918 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-12-02 15:40:01,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 15:40:01,919 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-12-02 15:40:01,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 15:40:01,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:01,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:01,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:40:01,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:01,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash -902435929, now seen corresponding path program 1 times [2023-12-02 15:40:01,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:01,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164661084] [2023-12-02 15:40:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:01,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 15:40:02,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164661084] [2023-12-02 15:40:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164661084] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864309648] [2023-12-02 15:40:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:02,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:02,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:02,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:02,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:40:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:02,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:40:02,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 15:40:02,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:40:02,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864309648] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:40:02,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:40:02,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-02 15:40:02,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009586997] [2023-12-02 15:40:02,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:40:02,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:40:02,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:02,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:40:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:40:02,181 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:40:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:02,203 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-12-02 15:40:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:40:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-12-02 15:40:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:02,205 INFO L225 Difference]: With dead ends: 29 [2023-12-02 15:40:02,205 INFO L226 Difference]: Without dead ends: 17 [2023-12-02 15:40:02,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:40:02,207 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:02,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-02 15:40:02,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-02 15:40:02,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-02 15:40:02,214 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2023-12-02 15:40:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:02,214 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-02 15:40:02,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:40:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-02 15:40:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 15:40:02,216 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:02,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:02,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:40:02,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:02,417 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:02,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1749095812, now seen corresponding path program 1 times [2023-12-02 15:40:02,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:02,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771900309] [2023-12-02 15:40:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:02,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 15:40:02,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:02,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771900309] [2023-12-02 15:40:02,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771900309] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:02,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854212684] [2023-12-02 15:40:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:02,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:02,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:02,520 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:02,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:40:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:02,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:40:02,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 15:40:02,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:40:02,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854212684] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:40:02,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:40:02,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-02 15:40:02,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677203732] [2023-12-02 15:40:02,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:40:02,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:40:02,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:02,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:40:02,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:40:02,653 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:40:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:02,673 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-12-02 15:40:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:40:02,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-12-02 15:40:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:02,674 INFO L225 Difference]: With dead ends: 27 [2023-12-02 15:40:02,674 INFO L226 Difference]: Without dead ends: 18 [2023-12-02 15:40:02,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:40:02,676 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:02,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:02,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-02 15:40:02,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-02 15:40:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-02 15:40:02,681 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2023-12-02 15:40:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:02,683 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-02 15:40:02,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:40:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-02 15:40:02,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 15:40:02,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:02,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:02,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:40:02,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:02,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:02,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 145221045, now seen corresponding path program 1 times [2023-12-02 15:40:02,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:02,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931664491] [2023-12-02 15:40:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:02,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 15:40:02,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:02,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931664491] [2023-12-02 15:40:02,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931664491] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:02,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120962990] [2023-12-02 15:40:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:02,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:02,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:02,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:02,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:40:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:03,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:40:03,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 15:40:03,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 15:40:03,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120962990] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:03,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [689389299] [2023-12-02 15:40:03,151 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:03,151 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:03,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:03,160 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:03,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:03,942 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:04,034 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:04,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:04,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:04,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:04,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-12-02 15:40:04,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268072811] [2023-12-02 15:40:04,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:04,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:40:04,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:04,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:40:04,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=266, Unknown=9, NotChecked=0, Total=342 [2023-12-02 15:40:04,502 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 15:40:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:04,533 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2023-12-02 15:40:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:40:04,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2023-12-02 15:40:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:04,534 INFO L225 Difference]: With dead ends: 36 [2023-12-02 15:40:04,534 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 15:40:04,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=266, Unknown=9, NotChecked=0, Total=342 [2023-12-02 15:40:04,536 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:04,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 15:40:04,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 15:40:04,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-02 15:40:04,541 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-12-02 15:40:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:04,541 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-02 15:40:04,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 15:40:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-02 15:40:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 15:40:04,542 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:04,543 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:04,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:40:04,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:04,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:04,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1399599531, now seen corresponding path program 2 times [2023-12-02 15:40:04,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:04,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504409890] [2023-12-02 15:40:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:04,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 15:40:04,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:04,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504409890] [2023-12-02 15:40:04,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504409890] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:04,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402966684] [2023-12-02 15:40:04,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:40:04,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:04,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:04,839 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:04,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:40:04,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:40:04,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:40:04,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:40:04,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 15:40:04,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 15:40:04,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402966684] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:04,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314628380] [2023-12-02 15:40:04,967 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:04,967 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:04,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:04,968 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:04,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:05,482 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:05,538 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:05,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '794#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:05,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:05,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:05,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-02 15:40:05,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373991968] [2023-12-02 15:40:05,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:05,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:40:05,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:05,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:40:05,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=266, Unknown=9, NotChecked=0, Total=342 [2023-12-02 15:40:05,938 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:40:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:05,973 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-12-02 15:40:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:40:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2023-12-02 15:40:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:05,977 INFO L225 Difference]: With dead ends: 38 [2023-12-02 15:40:05,977 INFO L226 Difference]: Without dead ends: 24 [2023-12-02 15:40:05,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=266, Unknown=9, NotChecked=0, Total=342 [2023-12-02 15:40:05,978 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:05,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-02 15:40:05,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-02 15:40:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-12-02 15:40:05,983 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2023-12-02 15:40:05,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:05,984 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-12-02 15:40:05,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:40:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-12-02 15:40:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 15:40:05,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:05,985 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:05,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 15:40:06,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:06,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:06,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:06,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1155318580, now seen corresponding path program 3 times [2023-12-02 15:40:06,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:06,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226055614] [2023-12-02 15:40:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-12-02 15:40:06,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:06,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226055614] [2023-12-02 15:40:06,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226055614] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:06,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811455818] [2023-12-02 15:40:06,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:40:06,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:06,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:06,266 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:06,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:40:06,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:40:06,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:40:06,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:40:06,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 15:40:06,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 15:40:06,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811455818] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:06,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427054545] [2023-12-02 15:40:06,479 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:06,479 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:06,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:06,480 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:06,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:06,797 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:06,827 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:07,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1137#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:07,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:07,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:07,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-02 15:40:07,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791316841] [2023-12-02 15:40:07,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:07,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 15:40:07,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:07,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 15:40:07,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=524, Unknown=9, NotChecked=0, Total=650 [2023-12-02 15:40:07,255 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 15:40:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:07,304 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-12-02 15:40:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:40:07,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2023-12-02 15:40:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:07,305 INFO L225 Difference]: With dead ends: 49 [2023-12-02 15:40:07,305 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 15:40:07,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=524, Unknown=9, NotChecked=0, Total=650 [2023-12-02 15:40:07,307 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:07,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 15:40:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 15:40:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-12-02 15:40:07,313 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2023-12-02 15:40:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:07,313 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-12-02 15:40:07,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 15:40:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-12-02 15:40:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 15:40:07,314 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:07,315 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:07,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 15:40:07,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:07,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:07,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash 807419389, now seen corresponding path program 4 times [2023-12-02 15:40:07,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:07,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753142756] [2023-12-02 15:40:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:07,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-02 15:40:07,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:07,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753142756] [2023-12-02 15:40:07,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753142756] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:07,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613897282] [2023-12-02 15:40:07,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:40:07,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:07,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:07,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:07,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 15:40:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:07,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 15:40:07,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-02 15:40:07,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-02 15:40:08,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613897282] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:08,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258116805] [2023-12-02 15:40:08,151 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:08,151 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:08,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:08,152 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:08,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:08,513 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:08,571 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:08,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1569#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:08,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:08,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:08,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2023-12-02 15:40:08,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136856204] [2023-12-02 15:40:08,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:08,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 15:40:08,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:08,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 15:40:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=977, Unknown=9, NotChecked=0, Total=1332 [2023-12-02 15:40:08,956 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 15:40:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:09,014 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2023-12-02 15:40:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 15:40:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2023-12-02 15:40:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:09,015 INFO L225 Difference]: With dead ends: 62 [2023-12-02 15:40:09,015 INFO L226 Difference]: Without dead ends: 43 [2023-12-02 15:40:09,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=346, Invalid=977, Unknown=9, NotChecked=0, Total=1332 [2023-12-02 15:40:09,017 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:09,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-02 15:40:09,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-12-02 15:40:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-12-02 15:40:09,024 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2023-12-02 15:40:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:09,025 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-12-02 15:40:09,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 15:40:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-12-02 15:40:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 15:40:09,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:09,027 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:09,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 15:40:09,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 15:40:09,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:09,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:09,232 INFO L85 PathProgramCache]: Analyzing trace with hash 485012861, now seen corresponding path program 5 times [2023-12-02 15:40:09,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:09,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521091306] [2023-12-02 15:40:09,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:09,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-02 15:40:09,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:09,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521091306] [2023-12-02 15:40:09,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521091306] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:09,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083382121] [2023-12-02 15:40:09,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:40:09,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:09,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:09,883 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:09,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:40:09,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 15:40:09,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:40:09,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:40:09,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 15:40:10,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 15:40:10,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083382121] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:10,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1848609434] [2023-12-02 15:40:10,164 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:10,164 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:10,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:10,164 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:10,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:10,491 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:10,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:10,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2133#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:10,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:10,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:10,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-12-02 15:40:10,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596719822] [2023-12-02 15:40:10,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:10,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 15:40:10,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:10,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 15:40:10,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1742, Unknown=9, NotChecked=0, Total=2162 [2023-12-02 15:40:10,994 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:40:11,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:11,067 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2023-12-02 15:40:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 15:40:11,067 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2023-12-02 15:40:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:11,068 INFO L225 Difference]: With dead ends: 69 [2023-12-02 15:40:11,069 INFO L226 Difference]: Without dead ends: 50 [2023-12-02 15:40:11,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=411, Invalid=1742, Unknown=9, NotChecked=0, Total=2162 [2023-12-02 15:40:11,071 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:11,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:40:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-02 15:40:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-02 15:40:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-12-02 15:40:11,078 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2023-12-02 15:40:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:11,079 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-12-02 15:40:11,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:40:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-12-02 15:40:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 15:40:11,080 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:11,081 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:11,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 15:40:11,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 15:40:11,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:11,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1010461529, now seen corresponding path program 6 times [2023-12-02 15:40:11,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:11,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258764965] [2023-12-02 15:40:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:11,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 15:40:12,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:12,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258764965] [2023-12-02 15:40:12,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258764965] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:12,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956322983] [2023-12-02 15:40:12,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:40:12,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:12,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:12,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:12,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 15:40:12,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:40:12,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:40:12,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 15:40:12,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 15:40:12,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 15:40:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956322983] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337961488] [2023-12-02 15:40:12,875 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:12,875 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:12,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:12,876 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:12,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:13,164 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:13,203 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:13,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2855#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:13,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:13,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:13,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2023-12-02 15:40:13,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504154784] [2023-12-02 15:40:13,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:13,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 15:40:13,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:13,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 15:40:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1321, Invalid=2576, Unknown=9, NotChecked=0, Total=3906 [2023-12-02 15:40:13,696 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 15:40:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:13,768 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2023-12-02 15:40:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 15:40:13,769 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2023-12-02 15:40:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:13,770 INFO L225 Difference]: With dead ends: 100 [2023-12-02 15:40:13,770 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 15:40:13,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1321, Invalid=2576, Unknown=9, NotChecked=0, Total=3906 [2023-12-02 15:40:13,773 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:13,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:40:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 15:40:13,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-02 15:40:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-12-02 15:40:13,782 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2023-12-02 15:40:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:13,782 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-12-02 15:40:13,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 15:40:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-12-02 15:40:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-02 15:40:13,784 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:13,784 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:13,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 15:40:13,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:13,986 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:13,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1741245219, now seen corresponding path program 7 times [2023-12-02 15:40:13,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:13,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358513588] [2023-12-02 15:40:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:13,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 15:40:16,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:16,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358513588] [2023-12-02 15:40:16,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358513588] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:16,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642325849] [2023-12-02 15:40:16,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:40:16,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:16,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:16,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:16,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 15:40:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:16,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 15:40:16,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 15:40:16,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-12-02 15:40:17,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642325849] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:17,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [813092540] [2023-12-02 15:40:17,554 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:17,554 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:17,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:17,554 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:17,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:17,804 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:17,831 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:18,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3851#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:18,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:18,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:18,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 63 [2023-12-02 15:40:18,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748204628] [2023-12-02 15:40:18,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:18,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-02 15:40:18,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:18,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-02 15:40:18,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1999, Invalid=3542, Unknown=9, NotChecked=0, Total=5550 [2023-12-02 15:40:18,474 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 15:40:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:18,552 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2023-12-02 15:40:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 15:40:18,553 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2023-12-02 15:40:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:18,554 INFO L225 Difference]: With dead ends: 112 [2023-12-02 15:40:18,554 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 15:40:18,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 238 SyntacticMatches, 38 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1999, Invalid=3542, Unknown=9, NotChecked=0, Total=5550 [2023-12-02 15:40:18,557 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:18,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:40:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 15:40:18,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-12-02 15:40:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2023-12-02 15:40:18,567 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 100 [2023-12-02 15:40:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:18,567 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2023-12-02 15:40:18,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 15:40:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2023-12-02 15:40:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 15:40:18,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:18,570 INFO L195 NwaCegarLoop]: trace histogram [60, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:18,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 15:40:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 15:40:18,775 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:18,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:18,776 INFO L85 PathProgramCache]: Analyzing trace with hash 657632349, now seen corresponding path program 8 times [2023-12-02 15:40:18,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:18,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903989955] [2023-12-02 15:40:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:18,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 2068 trivial. 0 not checked. [2023-12-02 15:40:19,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:19,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903989955] [2023-12-02 15:40:19,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903989955] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:19,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182097736] [2023-12-02 15:40:19,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:40:19,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:19,190 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:19,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:40:19,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 15:40:19,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:40:19,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:40:19,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2023-12-02 15:40:19,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2367 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2364 trivial. 0 not checked. [2023-12-02 15:40:19,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182097736] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:19,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727438191] [2023-12-02 15:40:19,439 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:19,439 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:19,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:19,439 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:19,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:19,678 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:19,704 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:20,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4923#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:20,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:20,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:20,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-12-02 15:40:20,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511059874] [2023-12-02 15:40:20,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:20,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 15:40:20,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 15:40:20,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=770, Unknown=9, NotChecked=0, Total=930 [2023-12-02 15:40:20,107 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:40:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:20,138 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2023-12-02 15:40:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 15:40:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 112 [2023-12-02 15:40:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:20,140 INFO L225 Difference]: With dead ends: 116 [2023-12-02 15:40:20,140 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 15:40:20,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=770, Unknown=9, NotChecked=0, Total=930 [2023-12-02 15:40:20,141 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:20,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 15:40:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-12-02 15:40:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2023-12-02 15:40:20,151 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 112 [2023-12-02 15:40:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:20,151 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2023-12-02 15:40:20,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:40:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2023-12-02 15:40:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 15:40:20,153 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:20,153 INFO L195 NwaCegarLoop]: trace histogram [60, 33, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:20,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 15:40:20,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:20,354 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:20,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:20,354 INFO L85 PathProgramCache]: Analyzing trace with hash -451191858, now seen corresponding path program 9 times [2023-12-02 15:40:20,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:20,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541048929] [2023-12-02 15:40:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:20,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2023-12-02 15:40:20,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:20,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541048929] [2023-12-02 15:40:20,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541048929] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:20,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29727308] [2023-12-02 15:40:20,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:40:20,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:20,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:20,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:20,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 15:40:21,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:40:21,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:40:21,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:40:21,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 290 proven. 66 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2023-12-02 15:40:21,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 0 proven. 356 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2023-12-02 15:40:21,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29727308] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:21,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442160488] [2023-12-02 15:40:21,218 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:21,218 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:21,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:21,219 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:21,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:21,451 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:21,475 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:21,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6063#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:21,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:21,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:21,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-12-02 15:40:21,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888779835] [2023-12-02 15:40:21,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:21,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 15:40:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 15:40:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1076, Unknown=9, NotChecked=0, Total=1482 [2023-12-02 15:40:21,844 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 15:40:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:21,886 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2023-12-02 15:40:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 15:40:21,887 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 119 [2023-12-02 15:40:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:21,888 INFO L225 Difference]: With dead ends: 134 [2023-12-02 15:40:21,888 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 15:40:21,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=1076, Unknown=9, NotChecked=0, Total=1482 [2023-12-02 15:40:21,890 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:21,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 15:40:21,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-12-02 15:40:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2023-12-02 15:40:21,902 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 119 [2023-12-02 15:40:21,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:21,902 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2023-12-02 15:40:21,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 15:40:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2023-12-02 15:40:21,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 15:40:21,905 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:21,905 INFO L195 NwaCegarLoop]: trace histogram [72, 60, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:21,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 15:40:22,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:22,105 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:22,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:22,106 INFO L85 PathProgramCache]: Analyzing trace with hash 436603581, now seen corresponding path program 10 times [2023-12-02 15:40:22,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:22,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357649597] [2023-12-02 15:40:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:22,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-12-02 15:40:23,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357649597] [2023-12-02 15:40:23,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357649597] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396186740] [2023-12-02 15:40:23,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:40:23,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:23,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:23,178 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:23,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 15:40:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:23,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 15:40:23,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 1252 proven. 300 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-12-02 15:40:23,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4632 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2023-12-02 15:40:24,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396186740] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:24,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998455666] [2023-12-02 15:40:24,174 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:24,174 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:24,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:24,174 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:24,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:24,410 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:24,435 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:24,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7525#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:24,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:24,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:24,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-12-02 15:40:24,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475822656] [2023-12-02 15:40:24,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:24,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-02 15:40:24,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:24,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-02 15:40:24,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1424, Invalid=2727, Unknown=9, NotChecked=0, Total=4160 [2023-12-02 15:40:24,863 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 15:40:24,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:24,928 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2023-12-02 15:40:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-02 15:40:24,929 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 158 [2023-12-02 15:40:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:24,930 INFO L225 Difference]: With dead ends: 173 [2023-12-02 15:40:24,930 INFO L226 Difference]: Without dead ends: 131 [2023-12-02 15:40:24,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1424, Invalid=2727, Unknown=9, NotChecked=0, Total=4160 [2023-12-02 15:40:24,933 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:24,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-02 15:40:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-12-02 15:40:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2023-12-02 15:40:24,945 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 158 [2023-12-02 15:40:24,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:24,946 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2023-12-02 15:40:24,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 15:40:24,946 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2023-12-02 15:40:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-12-02 15:40:24,948 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:24,948 INFO L195 NwaCegarLoop]: trace histogram [150, 60, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:24,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 15:40:25,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:25,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:25,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:25,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1548126621, now seen corresponding path program 11 times [2023-12-02 15:40:25,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:25,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27613081] [2023-12-02 15:40:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:25,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 6479 refuted. 0 times theorem prover too weak. 7006 trivial. 0 not checked. [2023-12-02 15:40:27,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:27,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27613081] [2023-12-02 15:40:27,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27613081] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:27,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140633997] [2023-12-02 15:40:27,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:40:27,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:27,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:27,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:27,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 15:40:27,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 15:40:27,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:40:27,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:40:27,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 5206 proven. 21 refuted. 0 times theorem prover too weak. 8258 trivial. 0 not checked. [2023-12-02 15:40:27,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13485 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13464 trivial. 0 not checked. [2023-12-02 15:40:28,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140633997] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:28,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [854809079] [2023-12-02 15:40:28,129 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:28,129 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:28,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:28,130 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:28,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:28,340 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:28,368 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:29,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9599#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:29,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:29,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:29,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2023-12-02 15:40:29,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015224318] [2023-12-02 15:40:29,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:29,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-12-02 15:40:29,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:29,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-12-02 15:40:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1543, Invalid=4610, Unknown=9, NotChecked=0, Total=6162 [2023-12-02 15:40:29,047 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:40:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:29,123 INFO L93 Difference]: Finished difference Result 208 states and 226 transitions. [2023-12-02 15:40:29,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-02 15:40:29,123 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 236 [2023-12-02 15:40:29,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:29,125 INFO L225 Difference]: With dead ends: 208 [2023-12-02 15:40:29,125 INFO L226 Difference]: Without dead ends: 140 [2023-12-02 15:40:29,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1543, Invalid=4610, Unknown=9, NotChecked=0, Total=6162 [2023-12-02 15:40:29,127 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:29,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:40:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-02 15:40:29,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-12-02 15:40:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2023-12-02 15:40:29,136 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 236 [2023-12-02 15:40:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:29,136 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2023-12-02 15:40:29,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 67 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:40:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2023-12-02 15:40:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-12-02 15:40:29,138 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:29,138 INFO L195 NwaCegarLoop]: trace histogram [153, 60, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:29,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 15:40:29,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 15:40:29,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:29,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:29,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1231753522, now seen corresponding path program 12 times [2023-12-02 15:40:29,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:29,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430159108] [2023-12-02 15:40:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:29,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 0 proven. 6736 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2023-12-02 15:40:31,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:31,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430159108] [2023-12-02 15:40:31,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430159108] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:31,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016357682] [2023-12-02 15:40:31,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:40:31,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:31,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:31,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:31,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 15:40:32,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:40:32,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:40:32,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 15:40:32,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 5410 proven. 1326 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2023-12-02 15:40:32,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 14031 backedges. 0 proven. 6736 refuted. 0 times theorem prover too weak. 7295 trivial. 0 not checked. [2023-12-02 15:40:33,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016357682] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124281766] [2023-12-02 15:40:33,363 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:33,363 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:33,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:33,363 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:33,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:33,588 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:33,614 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:34,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11823#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:34,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:34,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:34,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 63 [2023-12-02 15:40:34,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416300029] [2023-12-02 15:40:34,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:34,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-02 15:40:34,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:34,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-02 15:40:34,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1999, Invalid=3542, Unknown=9, NotChecked=0, Total=5550 [2023-12-02 15:40:34,247 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 15:40:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:34,320 INFO L93 Difference]: Finished difference Result 226 states and 244 transitions. [2023-12-02 15:40:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 15:40:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 247 [2023-12-02 15:40:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:34,322 INFO L225 Difference]: With dead ends: 226 [2023-12-02 15:40:34,322 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 15:40:34,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 676 SyntacticMatches, 44 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1999, Invalid=3542, Unknown=9, NotChecked=0, Total=5550 [2023-12-02 15:40:34,325 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:34,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 15:40:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-12-02 15:40:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2023-12-02 15:40:34,333 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 247 [2023-12-02 15:40:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:34,333 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2023-12-02 15:40:34,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 15:40:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2023-12-02 15:40:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-12-02 15:40:34,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:34,335 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:34,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 15:40:34,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 15:40:34,536 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:34,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:34,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1017116419, now seen corresponding path program 13 times [2023-12-02 15:40:34,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:34,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795742593] [2023-12-02 15:40:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:34,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-12-02 15:40:35,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:35,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795742593] [2023-12-02 15:40:35,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795742593] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:35,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483132087] [2023-12-02 15:40:35,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:40:35,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:35,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:35,218 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:35,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 15:40:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:35,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 15:40:35,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 7446 proven. 105 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2023-12-02 15:40:35,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18594 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-12-02 15:40:35,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483132087] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:35,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1626775954] [2023-12-02 15:40:35,942 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:35,943 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:35,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:35,943 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:35,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:36,148 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:36,174 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:36,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14233#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:36,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:36,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:36,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-12-02 15:40:36,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128997874] [2023-12-02 15:40:36,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 15:40:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 15:40:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=1397, Unknown=9, NotChecked=0, Total=1980 [2023-12-02 15:40:36,540 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 15:40:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:36,576 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2023-12-02 15:40:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 15:40:36,576 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 274 [2023-12-02 15:40:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:36,578 INFO L225 Difference]: With dead ends: 233 [2023-12-02 15:40:36,578 INFO L226 Difference]: Without dead ends: 165 [2023-12-02 15:40:36,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 794 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1397, Unknown=9, NotChecked=0, Total=1980 [2023-12-02 15:40:36,579 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:36,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:40:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-12-02 15:40:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-12-02 15:40:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2023-12-02 15:40:36,587 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 274 [2023-12-02 15:40:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:36,587 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2023-12-02 15:40:36,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 15:40:36,588 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2023-12-02 15:40:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-12-02 15:40:36,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:36,589 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 30, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:36,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 15:40:36,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 15:40:36,790 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:36,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash 513703933, now seen corresponding path program 14 times [2023-12-02 15:40:36,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:36,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983560283] [2023-12-02 15:40:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:36,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:40:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:40:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-12-02 15:40:38,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:40:38,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983560283] [2023-12-02 15:40:38,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983560283] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:40:38,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520014914] [2023-12-02 15:40:38,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:40:38,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:40:38,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:40:38,220 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:40:38,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 15:40:53,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-12-02 15:40:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:40:53,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 15:40:53,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:40:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 7446 proven. 465 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2023-12-02 15:40:53,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:40:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18954 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-12-02 15:40:54,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520014914] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:40:54,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300651896] [2023-12-02 15:40:54,743 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:40:54,743 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:40:54,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:40:54,743 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:40:54,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:40:54,950 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2023-12-02 15:40:54,975 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:40:55,501 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16816#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-12-02 15:40:55,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:40:55,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:40:55,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2023-12-02 15:40:55,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582158274] [2023-12-02 15:40:55,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 15:40:55,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 15:40:55,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:40:55,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 15:40:55,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=3456, Unknown=9, NotChecked=0, Total=5402 [2023-12-02 15:40:55,505 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 62 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 15:40:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:40:55,584 INFO L93 Difference]: Finished difference Result 262 states and 295 transitions. [2023-12-02 15:40:55,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-02 15:40:55,585 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 290 [2023-12-02 15:40:55,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:40:55,586 INFO L225 Difference]: With dead ends: 262 [2023-12-02 15:40:55,586 INFO L226 Difference]: Without dead ends: 194 [2023-12-02 15:40:55,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 826 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1937, Invalid=3456, Unknown=9, NotChecked=0, Total=5402 [2023-12-02 15:40:55,588 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:40:55,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:40:55,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-02 15:40:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2023-12-02 15:40:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0158730158730158) internal successors, (192), 189 states have internal predecessors, (192), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:40:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2023-12-02 15:40:55,596 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 290 [2023-12-02 15:40:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:40:55,596 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2023-12-02 15:40:55,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 15:40:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2023-12-02 15:40:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-12-02 15:40:55,598 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:40:55,598 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 59, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:40:55,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 15:40:55,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57335381-8506-4d72-92eb-0372cc3de275/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 15:40:55,799 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:40:55,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:40:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1704020564, now seen corresponding path program 15 times [2023-12-02 15:40:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:40:55,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843354197] [2023-12-02 15:40:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:40:55,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat